Fig. 1.

Abundance of nucleocapsid genes associated with SARS-CoV-2 and the number of hospitalized patients throughout the sampling period. (a) N1 gene, (b) N2 gene, (c) N3 gene. The right orange dashed line indicates the number of hospitalized patients needed to obtain qPCR signals for that N gene without time-lag while the left dashed line indicates the number of hospitalized patients needed to obtain qPCR signals for that N gene with time-lag. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)